I am now settled with my lens selection in that I have a trinity of zoom L lenses and a few primes. My bodies (6DII and 1Dmkiv) complement each other well for different tasks. I use a small selection of m4/3 gear for travel and more casual shooting so I am quite used to mirrorless and the supposed advantages. Sure the EVF and IBIS work well, but they are not quite as life altering as a lot of people on the internet would have us believe.
The canon mirrorless offerings don't tempt me at all. I need versatility and speed and solid C-AF a lot.
If I was to go mirrorless then I would need to see a lot of real world feedback from wildlife professionals. I just haven't seen that really. Hardly surprising with the frame rate... My 1div is almost welded to my 100-400ii and I often use it as a scope rather than lugging a pair of binos. Can't do that with mirrorless without a LOT of batteries. While the R glass looks amazing no doubt, the bottom line is that for me the sheer expense of system switching is just too high no matter what. I have spent the last 9 years building my kit and I am in no hurry to start again.
Living in the African bush for my whole working life I actually am a fan of old, proven technology. My Landcruiser is a straight six mechanically injected diesel with wind up windows. They still sell them like that if you want! Why? Because it is proven technology that has been developed over decades.
I dropped an olympus em10 from table height onto soft ground and the shutter was destroyed. Not great. My 1Div would have laughed at such an impact. It's hardly conclusive, but in my years of owning a 400D, a 40D, a 7D, a 1DIV and a 6Dii I have never had a failure that stopped me taking an image. I don't baby gear. My gear often lies on the floor of a boat or vehicle. It gets wet and is subject to intense humidity in the rains. Heat and dust in the dry season... etc etc.
I am not at all "anti" technology but for me I need to see a few more evolutions and confirmations that the system is for me and my personal uses. Basically a 1DX level camera (i.e. with the specs and battery life of the current mkii) with a higher MP count (30 mp would be enough!) but equal or better low light ability and a few more video features would be my dream camera.
I suspect that Canon have thought very long and very hard about their future. The R was to grab the gear head market who would buy just about anything. The RP is to get people into the ecosystem. A gateway drug if you like. Its gripping stuff all the changes in the camera world at the moment. I just hope that they really innovate again as they seem to have been in a bit of a rut for the last few years. I am not one to think that a Sony would do anything better for me, but I just can't help but be a bit saddened that their bottom tier full frame is so heavily spec laden compared to Canon's. It didn't stop me buying a 6Dii, but it is a little bit annoying.
Picture below just to liven up this pointless reply!